Asteroids

2025SO20 help

Last update: 2025-09-30 14:37 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.872

Aphelion (Q)

1.811

Eccentricity (e)

0.350

Inclination (i)

2.4

deg

Orbit period (P)

567.4

Earth MOID

0.00019

U parameter

6.5

Next Earth close approach

Date

2039-09-03

Nominal distance (from Earth center)

0.10834

16206995

Maximum Brightness

30.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.341270

1-sigma variation

0.000119

Unit

Eccentricity (e)

Value

0.350093

1-sigma variation

0.000075

Unit

Inclination (i)

Value

2.4147

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

5.4728

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

299.5407

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

63.95040

1-sigma variation

0.00967

Unit

Perihelion distance

Value

0.871701

1-sigma variation

Unit

Aphelion distance

Value

1.810838

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001235

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.423769

1-sigma variation

Unit

MOID

Value

0.000186

1-sigma variation

Unit

Orbit Period

Value

567.3780

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.41828E-8	8.90500E-9	5.16398E-8	-2.04767E-10	-7.13406E-8	-1.14989E-6
e	8.90500E-9	5.61168E-9	3.30177E-8	-5.59877E-10	-5.07686E-8	-7.19577E-7
i	5.16398E-8	3.30177E-8	2.07614E-7	-1.27296E-8	-4.34706E-7	-4.11634E-6
Ω	-2.04767E-10	-5.59877E-10	-1.27296E-8	1.00181E-8	1.26976E-7	-3.47066E-8
ω	-7.13406E-8	-5.07686E-8	-4.34706E-7	1.26976E-7	2.10464E-6	5.08121E-6
M	-1.14989E-6	-7.19577E-7	-4.11634E-6	-3.47066E-8	5.08121E-6	9.35115E-5

Date of computation: 2025-09-30 14:37 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

28.469

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

5 - 12*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.667059

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-29.402169

Unit

Source

[2]

Last Observation

Value

2025-09-30.492702

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

49 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2025SO20 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1963-05-29 14:12	> 1 d	0.0607131	0.0334789	0.0192220
EARTH	1968-07-19 15:08	> 1 d	0.1269372	0.1219494	0.0016750
EARTH	1973-09-23 16:46	1389.4	0.0304948	0.0134188	0.0056923
MARS	1976-07-03 14:16	59.9	0.0347235	0.0319031	0.0018261
EARTH	1978-10-10 19:36	573.5	0.1538031	0.1315228	0.0074268
EARTH	2010-05-24 11:10	716.5	0.1213086	0.0990554	0.0074868
EARTH	2015-06-15 19:14	> 1 d	0.0716075	0.0591526	0.0042864
EARTH	2020-08-10 19:30	> 1 d	0.1272232	0.1255536	0.0005574
EARTH	2025-09-28 06:46	< 1 min	0.0009150	0.0009144	0.0000002
EARTH	2039-09-02 15:35	> 1 d	0.1094779	0.0910003	0.0061672
EARTH	2053-07-19 17:48	> 1 w	0.1468862	0.1427947	0.0013926
EARTH	2067-06-06 12:47	> 1 d	0.0840963	0.0490504	0.0128294
EARTH	2081-05-22 00:32	893.3	0.0402207	0.0360605	0.0030005
EARTH	2084-10-06 15:34	626.2	0.0980347	0.0773026	0.0069108
EARTH	2095-05-13 04:10	198.4	0.1550254	0.1460564	0.0029949
EARTH	2098-09-25 22:06	273.5	0.0271042	0.0232373	0.0012894
MARS	2104-04-20 03:04	18.6	0.0392712	0.0305689	0.0030467
EARTH	2112-06-16 17:26	> 1 d	0.1080028	0.0811585	0.0091566
EARTH	2115-10-14 15:06	1216.7	0.1983157	0.1441609	0.0180529

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
43.81293291	264.88721501	0.00018594	MINIMUM
313.76368627	139.84408967	0.03573675	MINIMUM
358.08601636	201.39046672	0.14928095	SADDLE
179.29850834	23.03004229	0.82730664	SADDLE
358.79678736	22.42052593	1.85629792	SADDLE
179.45658660	203.13202851	2.82706537	MAXIMUM

Download:

MOID Plots

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